X-ray fluorescent screen mounting



Sept. 15, 1931. c 1 1,823,278

X- RAY FLUORESCENT SCREEN MOUNTING Filed Sept. 21, 1927 fledertich (l amfl u Y W25 Patented, Sept. I5, 1931:

PATENT "OFFICE rannnnicx o. MARI-INLOF nocnnsrnn, new Yonx, ASSIGNOR TO EASTMAN KODAK is COMPANY, or ROCH S R, .nnwxonx aoonronsrron or NEW YORK b i-RAY rnwonnscnm SCREEN V'VMOVUNTING Appn g qn' nea'sei tenber 21 1927. serial no, 221,113.

; This; in vention relates to photography and more particularly to a'means for detach- .ably fastening fluorescent screens used-to in tensify I the image p roduce'd on sensitized 1 lnaterial by X-raysin" suitable holdersi or cassettes, p 1

Oneobject'of my invention is to provide suitable attaching 1 materialon the fluorescent screen's,-andtoprovide means for pro Q tecting the attaching material until the -face will contact with the adhesive, while I the entire area may be protected. Still another object isto provide suitably prote'cted strips of double coated adhesive tape adapted for use in holding fluorescent j screensin holders, and other objects will appeanfrom the followingspecification, the

' novel features. being, particularlypointed out in the claims at the endthereof.

It hasbeen common'practice'to put drops ofg'lue on the back of fluorescent screens before placing them in the cassettes in which the film is used, it being also usual to place twov of such screens in the holder so that one may lie on each side of and in contact with a sensitive film. This rendered itdiiiicult to "L remove the fluorescent screens which are more or less fragile'and brittle and sometimes theglue drops in drying out crack off.

My present invention designed to overcome these defects. V

Coming now to the drawings wherein like reference characters zdenote like parts throughout:

Fig. 1 isfa perspective'vi'ew of a cassette with a pair of fluorescent screens, constructed 'in accordance with'and illustrating one embodiment of my invention, mounted therein with one edge of each rolled over for o purposes of illustration;

Another 7 construction.

Fig. 2 is an enlarged fragmentary plan viewof a-fluorescent screen provided with accordance with my invention; I

Fig.3 is an enlarged section through the screen provided with an adhesive and adhesive protector asin Fig; '2;

Fig; 4 is a fragmentary side elevation of a coil of adhesive material; and s Fig. 5 is a fragmentary plan view of a short length of tape with a tape protector of a diifere nt type from that shown in the preceding figures. a

I have taken as a typical'eirample of-a fluorescent screen, the screen shown in Patent'No.-1,532,782, Sheppard and Eberlin, April 7, 1925 although obviously my invent'ion' n ay be also applied to screens of other types when it maybe ne'cessarytohold a screen fiat in a cassette. In Fig. 1 I have shown a typical cassett which may consist of a main frame 1 having a bottom 2 forming a shallow bo'x like receptacle. To one edge 3 there is loosely hinged at 4 a back plate 5 preferably covered with a felt pad 6 and adapted to be resiliently positioned in frame 1 by suitable springs (not shown) carried by the back of plate 6.- This cassette is of well known It common practice to mount a fluorescent screen designated broadly as Sin both the top 5 and the bottom 2 of the cassette.

This, "in accordance with my invention is,

done by providing waterless adhesive areas To the backing layer 11 I provide one I or more adhesive areas in" the form of a waterless adhesive such as is known as fsurgeons tape which may be of any well known composition. For instance, itmay consist of a composition of coal tar pitch with any suitable softener such as benzol, gasoline or chloroform. Sucha composition is 'sufiicientlyfladherent Without .heat jalthoughsheat may be used if desired when pressing the adhesive area into position.

I;.find thin sheet metal or metal foil such -as -aluminum, tin or lead may bfe used as a protective covering and: preferably; the metal should, be formed with suitableprotuberances 15.3101 offsets so that avportion of its surface onlyl .may contact with the adhesive. Thusthe; foil sticks to the adhesive sufficiently toremain in place until used and it may be readily stripped off or replaced at will, :A screen? may be used in a cassette, removed 1- from; the cassette again and the protector may be replaced inwthe originalposition. I

As shown in thefirst four figures ofthe drawings,- a satisfactorygandeasily made protuberance lmay be'in the. forrn-of corrugations in which alternate transverse areas 16 and 17, each of less thanhalf the area of the protector are joined by offsets 18., This form has the additional function,

as illustrated'in} Fig. 4, that when Wound lntoa roll, the doublecoated adhesive con? tacts with both sides of the inner convolutions of the protectors, and'as the contacting area is relatively small the tapeunay; be

readily unwound for use. I

'Tform las .eflicient a p In use, {with a fluorescent InFig'; 5 the adhesive tapeZ O ispro videdzwitha fabric protector ofscrim 21 or open mesh fabric. Thisis not quiteassatisfactory asthemetal because the fibersof the material adhere more readily to the adhesive niaking stripping more difiicult, and,

area as does the metal.

equippedv withanadhesive area 10 it is only necessary to strip Oifthe protective cover ingl9, and the strip thus removed maybe retained for-rea laterremoved, from the cassette.

,lVith scree salready. in .use not equipped pplying if the screen isjtobe As will appear from the foregoing de-' scription certain features of my invention are useful in other embodiments than those used by way of illustration in the drawings, and I contemplate as within the scope o myinvention all such, embodiments as come within! the sco'pe of the appended claims. V 7

Having thus described myinvention, what I -.claim"'asiiew and desire to secure by Letters'Patent -is,- i

, l An X -ray intensifying screen includ- 'ing'a base,"an"adhesive area carried by the a base, and an adhesive protective layer c0vering' the'adhes'iv'e area, said protective layer comprisingasheetof roughened metal foil adapted. to be removed readily from said adhesive area. I r

2,=;A;n X-ray intensifying screen including-a jbfase, an; adhesive..;area carried by the base, and an adhesive protective layer coverlng the adhes1vearea-,sa1d protect ve layer comprising a thin sheet metal member having protuberances I formed therein contacting Withthe adhesive area, each adjacent P3117; of protnberances having a; surface therebetween "spaced from V i said adhesive area,-.;whereby said protectivelayer maybe readily stripped- -from said adhesive layer. 8. An X-ray intensifying screen includinga.base,an-adhesive area carried by the base,and an adhes ve protect ve layer covering the adhesive area, said protective layer I comprising a thin sheet metal' member havlng protuberances formed therein-contacting with the adhesive' area, adjacent pairs of protuberances having a surface therebetween spaced fromsaidadhesive area, each offisaid areas-contacting with the adhesive area being of lessthan half the' totalarea of said protective layer.

. Signed at'Bochester, New 'York'this 16th dayjof September, 1927.;

; FREDERICK MARTIN.

of course, the -op'en mesh fabric does, not 15*:- otector for the tacky screen i S with adhesive areas,-the double coated tape may .be purchased strips or rolls. (Fig.4) v v funwoimd and placed on the screens pressa ingonthe protective. covering 9 after which i this covering may be stripped off so the otherfside of the. adhesive'may be made to a e e t e 'p ert e h a swe t -1 

